Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average sea temperature in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
As August unfolds, the average high-temperature reaches a still agreeable 72.3°F (22.4°C), hinting at a slight fluctuation from the previous month. In the month of August, the average temperature dips to an enjoyable 61.9°F (16.6°C) during the night.Humidity
In Portland, the average relative humidity in August is 80%.Rainfall
In August, the rain falls for 13.4 days. Throughout August, 2.2" (56mm) of precipitation is accumulated. Throughout the year, in Portland, there are 127 rainfall days, and 21.93" (557mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in Portland, Maine.Ocean temperature
With an average ocean temperature of 63.9°F (17.7°C), August is the month with the warmest seawater.Note: Swimming is not an enjoyable activity for the majority when the water is at 63.9°F (17.7°C). The difficulty of controlling breathing increases as the temperature dips from 69.8°F (21°C) to 59°F (15°C).
Daylight
In Portland, Maine, the average length of the day in August is 13h and 56min.On the first day of August in Portland, sunrise is at 5:30 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 6:04 am and sunset at 7:17 pm EDT.
Sunshine
August has the most sunshine of the year in Portland, with an average of 10.7h of sunshine.UV index
June through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 5 in August translates into these instructions:
Be vigilant - A duty to shield skin and eyes from injury exists. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average August temperature in Portland?
What is the average humidity in August in Portland?
How many days does it rain in August in Portland?
When it does not snow in Portland?
When is the ocean warmest in Portland?
How cold is the water in August in Portland?
What is the average length of the day in August in Portland?
When is the sunrise / sunset in August in Portland?
What month has the most sunshine in Portland?
How long on average sun shines in August in Portland?
When is the highest UV index in Portland?
What is the UV index reading in August in Portland?
Average temperature in August
Portland, ME
- Average high temperature in August: 72.3°F
The warmest month (with the highest average high temperature) is July (72.5°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in August: 61.9°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in August
Portland, ME
- Average pressure in August: 29.96"Hg
The months with the highest atmospheric pressure are September and November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Portland, ME
- Average wind speed in August: 7.5mph
The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest months (with the lowest average wind speed) are July and August (7.5mph).
Average humidity in August
Portland, ME
- Average humidity in August: 80%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (74%).
Average rainfall in August
Portland, ME
- Average rainfall in August: 2.2"
The wettest month (with the highest rainfall) is October (2.36").
The driest month (with the least rainfall) is September (1.18").
Average rainfall days in August
Portland, ME
- Average rainfall days in August: 13.4 days
The month with the highest number of rainy days is July (14.7 days).
The month with the least rainy days is January (5.7 days).
Average snowfall in August
Portland, ME
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Portland, ME
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in August
Portland, ME
- Average sea temperature in August: 63.7°F
The best month for swimming (with the highest average sea temperature) is August (63.7°F).
The coldest month (with the lowest average sea temperature) is March (38°F).
Average daylight in August /
Average sunshine in August
Portland, ME
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in August: 10h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in August
Portland, ME
- Average sunshine days in August: 14.4 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (13.8 days).
Average UV index in August
Portland, ME
- Average UV index in August: 5
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in August
Portland, ME
- Average cloud cover in August: 29
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in August
Portland, ME
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Portland, Maine, USA
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